Nathan Charles, who played four tests for the Wallabies including two against the All Blacks, has been diagnosed with MND. Photo / Getty ImagesNathan Charles, who played four tests for the Wallabies including two against the All Blacks, has been diagnosed with MND. Photo / Getty Images

Nathan Charles spent most of his Super Rugby career representing the Western Force. Photo / PhotosportNathan Charles spent most of his Super Rugby career representing the Western Force. Photo / Photosport

Nathan Charles overcame cystic fibrosis to become a professional rugby player. Photo / PhotosportNathan Charles overcame cystic fibrosis to become a professional rugby player. Photo / Photosport

Nathan Charles' diagnosis comes months after NRL player Jai Arrow revealed he was living with the condition. Photo / PhotosportNathan Charles’ diagnosis comes months after NRL player Jai Arrow revealed he was living with the condition. Photo / Photosport